Propagate return value obtained from i2c_smbus_read_byte_data()
instead of hardcoding.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: T. Mertelj <tomaz.mertelj@guest.arnes.si>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
        if (config < 0) {
                        dev_err(&client->dev,
                        "Error reading configuration register, aborting.\n");
-                       return -EIO;
+                       return config;
        }
 
        switch (val) {
        if (config < 0) {
                dev_err(&client->dev,
                        "Error reading configuration register, aborting.\n");
-               return -EIO;
+               return config;
        }
        mutex_lock(&data->update_lock);
        switch (val) {